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Total Maximum Daily Load Program
A TMDL, or Total Maximum Daily Load, is a tool for implementing water quality standards and is based on the relationship between pollution sources and in-stream water quality conditions. The TMDL establishes the allowable loadings or other quantifiable parameters for a waterbody and thereby provides the basis to establish water quality-based controls. These controls should provide the pollution reduction necessary for a waterbody to meet water quality standards. |
REGION 10 TMDL-SPECIFIC INFORMATION
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What's New A new version (3.1) of the Better Assessment Science Integrating point and Nonpoint Sources (BASINS) software system has been released. BASINS supports the objectives of facilitating examination of environmental information, supporting analysis of environmental systems, and providing a framework for examining management alternatives. More for information and to download the model please visit http://epa.gov/waterscience/basins/
EPA approved Washington Department of Ecology's submittal of fecal coliform bacteria TMDL for the Issaquah Creek Basin on October 1, 2004. 
EPA approved Idaho and Oregon Department of Environmental Quality's submittal of Phosphorus, Dissolved Oxygen, Temperature, Sediment, Pesticide and Total Dissolved Gas TMDLs for the Snake River - Hells Canyon as described in EPA's press release.
The Snake River-Hells Canyon TMDL can be found on both State's websites at Oregon DEQ's website or Idaho DEQ's website.
Region 10 Specific TMDL Information
Water Quality Trading including the Water Quality Trading Assessment Handbook
TMDLs issued in Alaska, Idaho, Oregon and Washington
TMDL Success Stories in EPA Region 10
§303(d) Impaired Waterbodies Lists for Alaska, Idaho, Oregon and Washington
Schedules for Development of TMDLs in 303(d) Impaired Waterbodies in Region 10
Water Quality Standards for EPA Region 10 States
Region 10 TMDL State Program Managers
Who's Who in the Watershed Restoration Unit
Guiding Principles on EPA's Partnerships with Idaho, Oregon and Washington for Developing TMDLs
EPA Region 10's TMDL Review Guidelines
Columbia and Snake River TMDLs
EPA Region 10's Tribal Consultation Procedures for all Programs and EPA Region 10's Tribal Coordination and Consultation Policy for the TMDL Program (pdf file, 11 Kb, 2 pages)
Final Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards
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Alaska Department Environmental Conservation's TMDL Website
Idaho's Department of Environmental Quality's TMDL Website
Oregon Department of Environmental Quality's Water Quality Website
Washington Department of Ecology's TMDL Website
Guiding Principles on EPA's Partnerships with Idaho, Oregon and Washington for Developing TMDLs
Introduction to TMDLs (including slides and power point presentation)
EPA Region 10's Top Ten TMDL Technical Reference Picks
TMDL Definitions
EPA's Watershed Management Internet Course (Free)
Protocols
Protocol for Developing Pathogen TMDLs (PDF format 2.1 MB)
Protocol for Developing Sediment TMDLs (PDF format 1.8 MB)
Protocol for Developing Nutrient TMDLs (PDF format 2.5 MB)
National Policies and Guidance
National TMDL Technical Documents from EPA's Office of Water
National TMDL Policy and Program Documents (includes Statute and TMDL Regulations)
National TMDL Technical Documents from EPA's Office of Science and Technology
National Guidelines for Reviewing TMDLs Under Existing Regulations Issued in 1992
EPA's Water Quality Modeling Webpage and BASINS (a tool for managing watersheds)
Water Quality Trading Policy
TMDL Requirements for Storm Water Sources (pdf file)
Other Watershed Collaboration and Tools
Water Quality Trading
What to Do If Your Backyard Stream Becomes Listed (PDF format, 443 KB)
Integration of the CWA requirements with the Endangered Species Act (draft document)
Surf Your Watershed
TMDL Website (America's Clean Water Foundation and the Association of State and Interstate Water Pollution Control Administrators)
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Attempts have been made to include all TMDL information; however, this website may not be completely accurate and up to date with respect to TMDLs.
Unit: Watershed Restoration Unit
Point of contact: Jayne Carlin
Email: carlin.jayne@epa.gov
Phone Number: (206) 553-8512
Last Updated: 10/22/2004 04:05:34 PM
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